 /*******************************************************************************
  * Copyright (c) 2000, 2007 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.core.internal.variables;

 import org.eclipse.core.variables.IValueVariable;

 /**
  * Implementation of a value variable.
  */
 public class ValueVariable extends StringVariable implements IValueVariable {
     
     /**
      * Variable value or <code>null</code> if none
      */
     private String fValue;
     
     /**
      * Whether this variable is read only. If true, users cannot change the value.
      */
     private boolean fReadOnly;
     
     /**
      * Constructs a new value variable with the given name, description, read only
      * property and string value. Value can be null.
      *
      * @param name variable name
      * @param description variable description or <code>null</code>
      * @param readOnly whether the variable should be a read only variable
      * @param value the initial value of the variable or <code>null</code>
      */
     public ValueVariable(String name, String description, boolean readOnly, String value) {
         super(name, description, null);
         fReadOnly = readOnly;
         fValue = value;
     }
     
     /* (non-Javadoc)
      * @see org.eclipse.core.variables.IValueVariable#setValue(java.lang.String)
      */
     public void setValue(String value) {
         if (!isReadOnly()){
             fValue = value;
             StringVariableManager.getDefault().notifyChanged(this);
         }
     }
     
     /* (non-Javadoc)
      * @see org.eclipse.core.variables.IValueVariable#getValue()
      */
     public String getValue() {
         return fValue;
     }

     /* (non-Javadoc)
      * @see org.eclipse.core.variables.IValueVariable#isReadOnly()
      */
     public boolean isReadOnly() {
         return fReadOnly;
     }
     
     /* (non-Javadoc)
      * @see org.eclipse.core.variables.IValueVariable#isContributed()
      */
     public boolean isContributed() {
         return false;
     }

 }

